Not to be a cheap s.o.b. but my pump was corroded & I took it apart & cleaned it up & now it works just fine. Check the plug for it & if it has melted plastic then the insides of the pump are corroded from moisture and it's a bit seized up. A little contact cleaner & some patience on the electrical connector should put it right. Same thing with the inside parts...just the moisture over time and if you clean it up, it should work just fine.
I'll post up the p/n of the truck pump when I get to my tool box & look at my inventory sheet.
Have the injectors been done? May want to think this thru slowly about all the "wear" items that are antique under there: actuators, tank, control solenoid, CCVB gasket, CCVB hoses, temp sensors (ECM & Gauge), coils....etc, well you get the idea, right, I could go on and it can get expensive in a hurry. If you want p/n's on this stuff let me know as I think I have most of them.
Good luck with your new toy & welcome to the BOB!
Tom